This is a comparison of 1ct ideal cut, E color, VS1 clarity Emerald Cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $4260

White Flash: $5742

Abazias: $5774

Blue Nile: $5869

Brilliant Earth: $5970

These diamonds are independently inspected and graded by GIA/AGS, which means you can trust their quality. The quality of these diamonds is identical--the only thing that is different is the price.